Detachable double sash safety lock



7 J. MILLER 2,815,238

DETACHABLE DOUBLE SASH SAFETY LOCK Filed Jan. 26, 1954 INVENTOR. do:MILLER kaw z/w United States Patent Olfice 2,815,238 Patented Dec. 3,1957 DETACHABLE DOUBLE SASH SAFETY LOCK Joe Miller, Dallas, Tex.

Application January 26, 1954, Serial No. 406,303

2 Claims. (Cl. 292258) This present invention relates to a device forsecuring a pair of conventional window sashes from the inside of thehouse against attempts made from the outside by unauthorized personssuch as burglars or kidnappers to open the closed window by forcing theupper sash downward or the lower sash upward.

The main object of the invention is to provide a device of the characterdescribed and easily applied to adjacent parts of the sashes and to thewindow frame without changes in the structure of either and held in theposition by a member engaging the window frame.

Another object of the invention is to provide a device comprising aminimum number of parts which can be manufactured at low cost and arenot liable to get out of order or to need replacement.

With these objects in view and with others which will become apparent asthe invention is fully understood, the same consists in the combination,construction and arrangement of elements hereinafter specificallydescribed and distinctly claimed in the subjoined claims.

The description should be read in connection with the accompanyingdrawing, forming part of the application, and illustrating the preferredembodiment of my invention and wherein:

Fig. 1 is a perspective view of the preferred embodiment of my sashsecuring device;

Fig. 2 shows the device applied to the sashes and engaging the windowframe shown in horizontal section;

Fig. 3 is an elevational view of the device on a larger scale and partlyin section.

In the drawing numeral 5 denotes a screw bolt, terminating at one end ina flattened handle portion 6 adapted for being gripped by the operatorsfingers and having its flat sides at least partly serrated at 7 toafford a firm grip. The screw bolt is threadedly engaged with a nutmember 8 of preferably rectangular oblong shape and an eccentric tappedopening.

The opposite end of the screw bolt 5 has a slotted head 9 and adjacentthereto a peripheral groove 10 with slanting wall surfaces. The conicalhead 9' on the left side of groove 10 (Fig. 3) is journaled in acorrespondingly shaped opening provided in the conical portion 11 of anabutment member 12. The part of member 12 carrying the conical portionis substantially flat and terminates at one end in a slanting flange 13and at the other end in a spring hook 14.

Fig. 2 shows the device in operative position. The member 12 isvertically disposed and has the hook at the lower end. The outer surfaceof the hook adjacent the free end thereof engages the lower part of avertical frame member of the outer and upper sash 16 which slidesbetween outer guide strip 18 and intermediate strip 19 of the windowframe. The bight part of the hook engages the outer top corner edge ofthe upper horizontal frame member of the lower and inner sash 20 whichslides between the intermediate strip 19 and inner strip 22 as shown inFig. 2 in top plan view. The flange 13 forms the upper end of member 12.The longer dimension of nut 8 is horizontally disposed and after turningthe screw bolt in the proper direction engages the outwardly facingvertical surface of the innermost usually wider guide strip 22.Subsequent rotation of the screw compresses the spring hook and maycause engagement of the free edge of flange 13 with the inner verticalsurface of the upper sash frame. The spring hook 14 and eventuallyflange 13 prevent contact between head 9 and the upper sash frame.

If the device is disposed in the manner shown in Fig. 2 and abovedescribed, it will'defy attempts of an intruder to either lower theupper sash or raise the lower sash.

It should be understood that the present disclosure is for the purposeof illustration only and that the invention includes all modificationsand equivalents which fall within the scope of the appended claims.

What I claim and desire to secure by Letters Patent is:

1. A device for securing upper and lower sashes of a window slidable ina stationary frame comprising an abut ment member engageable with thesashes, operable screw means movably and inseparably connected with theabutment member, the sashes engaging member including a resilient hookengageable with the sashes and preventing contact of the screw meanswith the upper sash, and second screw means engaging the first screwmeansand upon operation of the first screw means directly engaging thestationary window frame for holding the device in its position andpreventing the opening of the window.

2. The device according to claim 1 and wherein the sashes engagingmember includes a flange opposite the hook and engageable with one sashafter compression of the hook.

Valentine Aug. 31, 1886 Wizek Dec. 22, 1931

